List of top Chemistry Questions on coordination compounds asked in CBSE CLASS XII

According to Werner's theory, the primary valencies of the central metal atom :
The oxidation number of Pt in [Pt(en)2Cl2]2+ is :
PCl$_3$, 2KCl does not give precipitate of AgCl with AgNO$_3$ solution. Write the structural formula and IUPAC name of the complex.
The number of moles of AgCl precipitated when excess AgNO$_3$ solution is mixed with one mole of [Co(NH$_3$)$_4$Cl$_2$]Cl is:
(ii) Carry out the following conversions: (I) Benzaldehyde to Benzophenone

Write two consequences of lanthanide contraction.

Which is the correct IUPAC name for
 

The most stable complex among the following is:

The IUPAC name of the complex [Co(NH₃)₅(ONO)]Cl₂ is:

The geometry of paramagnetic nickel complex [NiCl₄]²⁻ is:

Out of Fe²⁺, Co²⁺, Cr³⁺, Ni²⁺, the one which shows the lowest magnetic moment is:
[Atomic number: Fe = 26, Co = 27, Ni = 28, Cr = 24]